The SoftMed surgical disposable mask is made of three distinct layers. The first layer is a Polypropylene Spunbond or PPSB material in light blue ( or white) , the second layer is Meltblown white, and the third is again PPSB white. The back and front layers (does not matter whether white or light blue) are identical in terms of the nature of the material used. The colour of the exterior layers whether white or light blue is only for aesthetical purposes. You can wear the mask either way. The middle layer stops bacteria and viruses from penetrating your body. So, there is no wrong way to wear a Softmed surgical mask.